Universal Scientific Industrial AP-AG-AT-01, User Manual

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Appendix A Glossary
Access Point
- An internetworking device that seamlessly connects wired
and wireless networks.
Ad-Hoc
- An Ad-Hoc wireless LAN is a group of computers each with
wireless adapters, connected as an independent wireless LAN.
Backbone
- The core infrastructure of a network. The portion of the network
that transports information from one central location to another central
location where it is off-loaded onto a local system.
Base Station
- In mobile telecommunications, a base station is the central
radio transmitter/receiver that maintains communications with the mobile
radio telephone sets within range. In cellular and personal communications
applications, each cell or Inter-Buildingcell has its own base station; each
base station in turn is interconnected with
other cells’ base.
Bridge
- An internetworking function that incorporates the lowest 2 layers of
the OSI network protocol model.
BSS
- Stands for “Basic Service Set,” an Inter-Building Access Point and all
the wireless clients that associated with it.
ESS
- Stands for “Extended Service Set.” More than one BSS can be
configured as an Extended Service Set. Mobile users can roam between
BSS in an ESS.
Ethernet
- A popular local area data communications network, originally
developed by Xerox Corp., which accepts transmission from computers and
terminals. Ethernet operates on 10 Mbps baseband transmission over
shielded coaxial cable or over shielded twisted pair telephone wire.
Infrastructure
- An integrated wireless and wired LAN is called an
Infrastructure configuration.
PCMCIA
- Personal Computer Memory Card International Association,
which develops standards for PC cards, formerly known as PCMCIA cards,
are available in three “types” which are about the same length and width as
credit cards, but range in thickness from 3.3 mm (Type I) to 5.0 mm (Type II)
to 10.5 mm (Type III). These cards can be used for many functions,
including memory storage, landline modems and wireless modems.
Roaming
- A wireless clients around an ESS and get the continuous
connection to the Infrastructure network.
RTS Threshold
– Transmitters contending for the medium may not hear
each other. RTS/CTS mechanism can solve this “ Hidden Node Problem”. If
the packet size is smaller than the preset RTS Threshold size, the RTS/CTS